CN218754769U

CN218754769U - Improved jack pump core

Info

Publication number: CN218754769U
Application number: CN202223237067.6U
Authority: CN
Inventors: 龚力; 费建飞
Original assignee: Jiaxing Shuntian Machinery Co ltd
Current assignee: Jiaxing Shuntian Machinery Co ltd
Priority date: 2022-12-05
Filing date: 2022-12-05
Publication date: 2023-03-28
Anticipated expiration: 2032-12-05

Abstract

The utility model discloses an improved generation jack pump core, including the pump shaft, constitute the piston pump structure with the pump body, the ring channel is established to the one end that the pump shaft was beaten oil, install first sealing member in the ring channel, first sealing member has at least twice annular seal portion. The utility model discloses seal structure to between the pump body of jack and the pump shaft has changed, and the first sealing member of pump shaft one end of buying oil has twice annular seal portion, strengthens sealed, reaches the effect that prevents hydraulic oil leakage for domestic little jack is avoided being made dirty by the greasy dirt, maintains at cleaner state, in order to facilitate the use.

Description

Improved jack pump core

Technical Field

The utility model relates to a jack technical field, concretely relates to improved generation jack pump core.

Background

The hydraulic jack is widely applied and has various types as a common hoisting tool, wherein a manual vertical oil jack is usually adopted for vehicle-mounted hoisting equipment. The pump core is a key part in the hydraulic jack, when the jack works, the pump core is ejected to perform oil pumping, and the sealing performance of the pump core is particularly important in the ejection process of the pump core.

The conventional pump core is sealed as shown in figure 1, an O-shaped ring and a check ring are arranged at the oiling end of the pump core to realize sealing with a pump body, the structure is simple, the cost is low, but the pump core has the defects of poor sealing performance and poor reliability. After the jack is used for a long time, a pump core is generally a main oil leakage point, the performance of the jack can be reduced, and for many household users, the greater problem is that hydraulic oil is exposed to pollute the operating environment, which brings great inconvenience.

SUMMERY OF THE UTILITY MODEL

In order to improve the sealing performance of jack pump core, the utility model provides an improved generation jack pump core.

The utility model adopts the technical scheme as follows: the utility model provides an improved generation jack pump core, includes the pump shaft, constitutes the piston pump structure with the pump body, the ring channel is established to the one end that the pump shaft was beaten oil, install first sealing member in the ring channel, first sealing member has at least twice annular seal portion.

Preferably, the first sealing element is at least two O-ring seals.

Preferably, the outer O-ring is provided with a retaining ring.

Preferably, the O-shaped sealing ring is made of rubber, and the retainer ring is made of polytetrafluoroethylene.

Preferably, the first sealing element is a special-shaped sealing ring, and two sealing bulges and one anti-extrusion part are sequentially arranged on the periphery of the special-shaped sealing ring along the axial direction.

Preferably, a second sealing member is mounted at the aperture of the pump body corresponding to the pump shaft.

Preferably, the second sealing element is a Y-shaped unequal-height sealing ring.

The utility model discloses following beneficial effect has: the utility model discloses seal structure to between the pump body of jack and the pump shaft has changed, and the first sealing member of pump shaft one end of buying oil has twice annular seal portion, strengthens sealed, reaches the effect that prevents hydraulic oil leakage for domestic little jack is avoided being made dirty by the greasy dirt, maintains at cleaner state, in order to facilitate the use.

Drawings

Fig. 1 is a schematic diagram of a pump core structure of a conventional hydraulic jack.

Fig. 2 is a schematic cross-sectional view of an embodiment of the present invention.

Fig. 3 is a schematic view of a first sealing member according to an embodiment of the present invention.

Fig. 4 is a schematic view of another first sealing member according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of a second sealing member according to an embodiment of the present invention.

The pump body 1, the pump shaft 2, the O-shaped sealing ring 3, the retainer ring 4, the special-shaped sealing ring 5, the sealing bulge 501, the anti-extrusion part 502 and the Y-shaped unequal-height sealing ring 6.

Detailed Description

The present invention will be further explained with reference to the following embodiments and accompanying drawings.

In the embodiment, as shown in fig. 2 to 5, an improved jack pump core is provided, which includes a pump shaft 2, and a piston pump structure is formed by the pump shaft and a pump body 1, an annular groove is formed at an oil-pumping end of the pump shaft 2, and a first sealing element is installed in the annular groove and has at least two annular sealing portions. The sealing structure between the pump body 1 and the pump shaft 2 of the jack is changed in the embodiment, the first sealing element at the oiling end of the pump shaft 2 is provided with two annular sealing parts, sealing is enhanced, the effect of preventing hydraulic oil leakage is achieved, the domestic small jack is prevented from being polluted by oil stains, and the small jack is maintained in a relatively clean state so as to be convenient to use.

In the embodiment shown in fig. 3, the first sealing element is at least two O-rings 3, and the outer O-ring 3 is provided with a retaining ring 4. Wherein, O type sealing washer 3 is the rubber material, and retaining ring 4 is the polytetrafluoroethylene material. The O-shaped sealing ring 3 is the most common sealing element, has the advantages of low cost and good compatibility, and is convenient to overhaul and maintain. The retainer ring 4 is circular ring-shaped, and is higher than the O type sealing washer 3 intensity, anti extrudability is also better, installs low pressure one side on the pump shaft 2, and itself is not sealing element, but as the replenishment of O type sealing washer 3, and the purpose is in the clearance of the pump body 1 and pump shaft 2 of being impressed in order to reduce O type sealing washer 3 for the whole bearing capacity of first sealing member is better, also can prolong O type sealing washer 3's life.

In the embodiment, as shown in fig. 4, the first sealing element is a special-shaped sealing ring 5, and two sealing protrusions 501 and one anti-extrusion portion 502 are sequentially arranged on the outer periphery of the special-shaped sealing ring 5 along the axial direction. Compared with the structure, the structure has the advantages that the overall rigidity and the pressure-bearing performance of the special-shaped sealing ring 5 are better, the number of parts is small, and the defect is that the special-shaped sealing ring 5 needs to be customized.

In the embodiment, as shown in fig. 5, a second sealing member is installed at the orifice of the pump body 1 corresponding to the pump shaft 2, and the second sealing member is a Y-shaped unequal-height sealing ring 6. The Y-shaped unequal height seal ring 6 is suitable for reciprocating seal, and therefore can be better applied to the piston pump structure of the present embodiment. The Y-shaped unequal-height seal ring 6 of the present embodiment is disposed at the operating end of the pump shaft 2, that is, at a position close to the orifice on the pump body 1, and plays a role in auxiliary sealing, so as to prevent external dust from entering the pump body 1, thereby reducing failures. When the structure is applied to the embodiment, the main purpose is to further reduce the exposure of the hydraulic oil, so that the appearance of the jack is kept clean.

It is obvious that the above embodiments of the present invention are only examples for illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other obvious changes and modifications which are obvious to those skilled in the art are also within the scope of the present invention.

Claims

1. The utility model provides an improved generation jack pump core, includes pump shaft (2), constitutes the piston pump structure with pump body (1), its characterized in that, the ring channel is established to the one end that pump shaft (2) were beaten oil, install first sealing member in the ring channel, first sealing member has at least twice annular seal portion.

2. An improved jack pump core as claimed in claim 1 wherein said first seal is at least two O-ring seals (3).

3. Improved jack pump jack core according to claim 2, characterised in that the outer O-ring seal (3) is provided with a collar (4).

4. An improved jack pump core as claimed in claim 3, wherein said O-ring (3) is made of rubber and said retainer ring (4) is made of PTFE.

5. The improved jack pump core as claimed in claim 1, wherein the first sealing element is a profiled sealing ring (5), and two sealing protrusions (501) and one anti-extrusion part (502) are sequentially arranged on the outer periphery of the profiled sealing ring (5) along the axial direction.

6. An improved jack pump core as claimed in claim 1, characterized in that a second seal is mounted at the aperture of the pump body (1) corresponding to the pump shaft (2).

7. An improved jack pump core as claimed in claim 6, characterised in that said second seal is a Y-shaped unequal height seal ring (6).